Injectible two-staged rotary compressor and heat pump system

a rotary compressor and heat pump technology, applied in the direction of heat pumps, positive displacement liquid engines, domestic cooling apparatus, etc., can solve the problems of reducing reliability, and affecting the operation of compressors

Inactive Publication Date: 2008-10-02
FUJITSU GENERAL LTD
View PDF24 Cites 35 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009]It is an object of the present invention to at lea...

Problems solved by technology

In addition, to maintain the reliability of a compressor, the compressor must be limited in operating pressure ratio and rotation frequency.
However, in the conventional gas injection cycle, the reliability decreases if too much liquefied refrigerant is mixed into the injected refrigera...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Injectible two-staged rotary compressor and heat pump system
  • Injectible two-staged rotary compressor and heat pump system
  • Injectible two-staged rotary compressor and heat pump system

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0037]As shown in FIG. 1, the air conditioner includes an injectable two-staged rotary compressor (hereinafter, “compressor”) 11, a condenser (heat radiator) 13, a first expanding mechanism unit 15, a second expanding mechanism unit 17, an evaporator (heat absorber) 19, and a main circulation pipe 21.

[0038]The compressor 11 is an injectable two-staged rotary compressor, and further includes a lower stage compressing unit 11L and an upper stage compressing unit 11H. The lower stage compressing unit 11L and the upper stage compressing unit 11H are connected by an interconnecting pipe, and a second suction pipe 23 is connected to the interconnecting pipe. The second suction pipe 23 is used to suck an intermediate-pressure injected refrigerant. The intermediate pressure is a pressure between the pressure of the refrigerant in the condenser and the pressure in the evaporator. The compressor 11 is a so-called “inverter compressor”, i.e., the rotation frequency of the compressor 11 can be...

third embodiment

[0109]In the compressor 71 to allow the refrigerant in the compressor 71 to exchange heat, the second suction pipe 23 is extended into the upper stage discharging muffler room 180H in the sealed container 100, and connected to the suction side of the upper stage compressing unit 11H.

[0110]The other elements in the compressor 71 are the same as those according to the first embodiment. Therefore, the same reference numbers as the first embodiment are given in the FIG. 12, and detailed explanations thereof are omitted herein.

[0111]With reference to FIG. 9, it will be now explained how the refrigerant flows through the compressor 71. The basic-cycle refrigerant overheated at the evaporator (heat absorber) 19 flows through the four-way valve 33 and the accumulator 250 to reach the first suction pipe 31. Upon entering the lower stage compressing unit 11L through the first suction pipe 31, the basic-cycle refrigerant is compressed to the intermediate pressure at the lower stage compressin...

fourth embodiment

[0117]In the compressor 81 to allow the refrigerant in the compressor 81 to exchange heat, the second suction pipe 23 is extended into a lubricating oil reservoir 260 located at the bottom of the sealed container 100, and connected to the lower stage discharging muffler room 180L.

[0118]The other elements in the compressor 81 are the same as those according to the first embodiment. Therefore, the same reference numbers as the first embodiment are given in the FIG. 13, and detailed explanations thereof are omitted herein.

[0119]With reference to FIG. 13, it will be now explained how the refrigerant flows through the compressor 81. The basic-cycle refrigerant overheated at the evaporator (heat absorber) 19 flows through the four-way valve 33 and the accumulator 250 to reach the first suction pipe 31. Upon entering the lower stage compressing unit 11L through the first suction pipe 31, the basic-cycle refrigerant is compressed to the intermediate pressure at the lower stage compressing ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

In an injectable two-staged rotary compressor, a second suction pipe includes a heat-exchange promoting unit that promotes heat exchange between intermediary-pressure injected refrigerant and internal space or an external surface of a sealed container. The heat being exchanged by the intermediary-pressure injected refrigerant absorbing heat.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to an injectable two-staged rotary compressor and a heat pump system.[0003]2. Description of the Related Art[0004]The gas injection cycle is advantageous in that it increases the amount of refrigerant circulated through a heat radiator, and improves a heat-radiating capacity (heater capacity or water heater capacity). These advantages are achieved by having a structure in which a compressor sucks in additional refrigerant also during a compression process. Especially in cold regions, the amount of the circulated refrigerant decreases, because a base gas sucked into the compressor is diluted because of cold; therefore, it is effective to increase the amount of circuited refrigerant by an injection. Even if the injection is performed during the compression process, the amount of the refrigerant circulating through an evaporator stays the same, because the amount of the circulated refrigerant ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F04B23/08F25B13/00F25B43/02
CPCF04C18/3442F04C23/001F04C29/042F04C18/356F25B1/10F25B2400/13F25B2700/21152F25B1/04F04C18/02F25B30/02
Inventor MOROZUMI, NAOYAUEDA, KENSHI
Owner FUJITSU GENERAL LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap